No Green Ring for the 600mm and 800mm STM w/ Diffractive Optics?

As these two DO lenses are very different from all the ones we've seen before, especially in terms of price, I think we'll see DO in a lot of upcoming Canon Tele lenses.

If that is the case, rebranding a large chunk of the highest end lines from the iconic red to this (in my opinion extremely ugly) green does not make sense.

In any case, these newer lenses are have nothing but the focal length in common with previous DO teles. Slapping something in them that links them to other market segments does not make sense. We don't have separate colors for IS, USM/STM or BR elements, why do we need one for DO?
 
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At the time, we were led to believe that the green ring meant L quality and signified the special optics.

Yep, and it was then Diffractive Optics' symbol, I'm just musing why it hadn't been continued.

Gold rings were seen on a series of Non-L Ultrasonic Motor (USM) lenses, this series was slowly discontinued over the years.

Silver ring seems to denote STM lenses. I now notice that the RF 600 and 800mm have a silver ring.

Perhaps a high end RF DO lens will carry the green ring in the future.

canon_8404b002_ef_400mm_f_4_do_1464714331_1081814.jpg

(I forgot about this one)
 
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Canon was way to successful in marketing the red ring L glass that the green ring immediate makes me think it is inferior and the mark I 400 DO and other early DO lenses didn't do it any favours. Going forward I am fully expecting all the fast super-tele lenses to be DO lenses and red ring L lenses.
 
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